Self-fertilization, especially in plants where a flower is fertilized by its own pollen.

A condition in which the immune system mistakenly attacks the body’s own tissues.

The part of the nervous system that controls involuntary actions, such as heart rate and digestion.

An organism with more than two sets of chromosomes, all from the same species.

A technique that uses radioactive isotopes to visualize molecules or fragments in tissues or cells.

Characterized by or suffering from asthenia; having a weak or thin body structure.

Microtubule structures that radiate from the centrosome during mitosis in animal cells.

The study of the origin, evolution, distribution, and future of life in the universe.

Not identical on both sides of a central line; lacking symmetry.

A congenital malformation of the spine; not common in biological literature.